Sound suppressing ventilator fitting for windows



E. T. FISK Sept. 15, 1931 SOUND SUPPRESSING VENTILATOR FITTING FORWINDOWS Filed June 27, 1928 II IIIIJ Patented Sept. 15, 1931 ERNESTTHOMAS FISK, OF SYDNEY, NEW SOUTH WALES-'AUSTRALIA SOUND SUPPRESSINGVENTILATOR FITTING FOR WINDOWS Application filed June 27, 1928, SerialNo.

The object of this invention is to provide improved means whereby whenwindows are opened in noisy localities to permit effective ventilationthe incoming sound waves will be absorbed or damped in a satisfactorydegree. The devices herein proposed for this purpose tend to promoteventilation rather than to retard it through the opened window space.They also operate to reduce the heating of apartments by reflected raysfrom without and to check entrance of rising currents of hot air andalso to check theincoming of dust from the street. 7

The invention is illustrated in the accompanying drawings in which Fig.1 is a vertical transverse section through a sliding sash window. andFigs. 2, 3 and 4c are views similar to Fig. 1 illustrating modificationsof the invention.

I The device in which the invention consists is constituted of twopanels disposed in angular relation one above the other, one panel 10being a sound dampening structure containing ventilating apertures, andthe other panel 11 being transparent or translucent to permit thepassage of daylight. The lower panel 10 extends outward, or outward andupward from the lower edge of the window aperture; the upper panel 11extends upward, or upward and. inward from the outer edge of the lowerpanel 10. If the apparatus is erected within the reveal the sides of thelatter form closures, thus completing a hopper-shaped structure capableof being opened at the top, and its bottom opened only through the soundabsorbentventilating apertures. When the apparatus cannot be fittedwithin the reveal it is necessary to protect the sides against the entryof sound waves and this can be done by 41') fitting panels such as 13 oftransparent,

translucent or opaque material.

Either the upper or lower panel or both may be mounted on hinges so thattheir angular adjustment can be altered at will; or both panels may befixed.

The panel 10 may be constructed of a sheet of sound absorbent material18, containing ventilating apertures 14 as in Fig. 2. Alternatively. thepanel may be constructed as a al box-like structure as in Figs. 1, 3 and4, the

288,763, and in Australia. July 27, 1927.

sides of the box being closed and the top 15 and bottom 16 of the boxaperture'd as at 17. This cellular panel may be constructed of soundabsorbent material such as is known under the trade mark Celotex, or itmay be constructed of other material and lined with sound absorbentmaterial as shown at 20 in Fig. 8. The upper faceiof the sound absorbentpanels 10 and 18 may be surfaced with light reflecting material tofacilitate transto mission of daylight into the apartment. Referring toFig. 1, the cellular panel 10 is hingedly mounted at 21 "on the sill; 22is a stay for holding it in the desiredposition. The upper panel 11 ishinged at 23 to th'e panel 10 and is held in adjusted position by thestay 24; it is shown in vertical position in full lines and in itstilted position touching the sash, in dotted lines. When the panel 11 isdisposed in a substantially'vertical directio'n a flue effect isobtained, so that in most cases a more satisfactory exchange of air' isprocured than in the caseof an ordinary open window. Warm air currentsrising from below promote an upward draught which tends to draw'air outof the apartment, giving the effect of an exhaust ventilator. Cool aircurrents moving downward from above aredeflected inward, thus tendingtoreplenish the apartment with freshair. The outside air 80 currentsthus operate sometimes to promote inflow and at other times to promoteoutflow of air.

By inclining the free edge of the panel 11 away from the window aperturethe amount x of ventilation can be regulated in any mea s ure that maybe desired; if it'be tilted toward the aperture sufliciently to contactwith the sash face or the sill, ventilation is then obtained onlythrough the perforations through ,90 the cellular panel. This control isadvantageous in cold weatherwhen a small degree of'distributedventilation isall that is needed. Such tilting of this panel also maybeemployed to checkthe entry of rain or snow into as the apartment.

Fig. 2-shows a sash window fitted with a sound absorbent perforatedpanel 18, hingedly mounted by a double-fold hinge 25 to the sill topermit it and the upper panel 11a to are be swung inward and suspendedwhen not in use, as indicated in dotted lines. The upper panel 11a ishinge mounted on the lower panel as in the Fig. 1 construction and stays22a and 24a are provided for holding the panels in position. The spacesat the sides of the fitting are in this case closed by means of wingpanels 13 which are hinge mounted on the sides of the top panel 11a sothat they may be folded against it when not in use, as for instance,when the fitting is swung into the apartment as shown in dotted lines.

Fig. 3 is a view similar to Fig. 2 but show-- ing wing panels on thepanel 10a as well as on the panel 117). and a cellular sound absorbentpanel 10a. This view also shows in dotted lines how the fitting isdropped and held suspended below the window opening when not in use.

Fig. 4 shows a fitting erected as a permanent fixture extendinghorizontallv from the sill. with rectangular wing panels 130 closing thespaces hetween the upper panel 110 and the wall face. In this view thecellular anel is shown lined with sound absorbent material level of thesill and disposed substantiallv ina h r ro tal posit on. and a secondpanel arran ed above the fi st panel disposed in suh- V stant allv avertical position. and means for securing the second mentioned pane invarious adiusted positions to varv the degree of venti ation.

.2. In com ination. a wall havinlq an aperture and a s ll. a soundsuppressing Ventilator fitting. including a erforate panel at the levelof the sill and disposed substantiallv in 'a horiaontal position. and asecond panel arran d above the first panel disposed in suhstantiallv avertical position. means mounting the first panel for swinging movementabout one of its edges and means mounting the second panel for movementabout another ed e of the first panel.

3. In combinat on. a, wall having an aperture. a lower panel of soundahsorbent material havinn' ventilating apertures and extending outwardfrom the wall aperture. and an upper panel of light transmittingmaterial extending upward from the outer edge of the lower panel. saidlower panel having an upper light reflecting surface. a

4. In combination a wall having an aperture and a sill, two main panelsfitted outside the wall aperture one above the other, the lower panelbeing of sound-absorbent structure and having ventilating apertures andextending outward from the sill and the upper panel being adapted totransmit light and extending upward from the outer edge of the lowerpanel, and lateral panels in the spaces between the wall and the panels.

In testimony whereof I affix my signature.

' ERNEST THOMAS FISK.

